Process for the manufacture of polyurethanes by carbonylation of nitrated hydroxy-aromatic compounds
US4426515A · kind A · utility
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9Claims
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Key dates
| Filing date | Apr 21, 1983 |
| Grant date | Jan 17, 1984 |
| Priority date | — |
| Expiry date | Apr 21, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G71/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the manufacture of polyurethanes by direct reaction in the liquid phase, comprising reacting, in the presence of a catalyst, carbon monoxide with a nitrated hydroxy-aromatic derivative of the formula: EQU HO--Ar--NO.sub.2 wherein Ar represents the aromatic radical: ##STR1## with the nitro and hydroxyl functional groups being in the para or meta positions with respect to each other, and R representing hydrogen or halogen atoms, or an alkyl group containing from 1 to 10 carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.